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The document's own pixel budget, marching ants at screen resolution (12.11a)

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雷电芽衣 committed 2026-09-29 00:19:45 -04:00
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commit 8a9c56ee1f
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tests/ImageSizeTests.cpp
+43 -25
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@@ -1,3 +1,4 @@
#include "Document/DocumentLimits.h"
#include "AddressSpaceLimit.h"
#include "Document/EditorSession.h"
#include "Document/LayerMask.h"
@@ -170,8 +171,8 @@ void ImageSizeTests::limitsAreJudgedAtTheirEdges()
QCOMPARE(resizeError(input, {.width = 10, .height = 0, .resolution = 72}), tooLarge);
QCOMPARE(resizeError(input, {.width = 30'001, .height = 10, .resolution = 72}), tooLarge);
QCOMPARE(resizeError(input, {.width = 10, .height = 30'001, .resolution = 72}), tooLarge);
QCOMPARE(resizeError(input, {.width = 10'000, .height = 10'000, .resolution = 72}), std::nullopt);
QCOMPARE(resizeError(input, {.width = 10'000, .height = 10'001, .resolution = 72}), tooLarge);
QCOMPARE(resizeError(input, {.width = 20'000, .height = 10'000, .resolution = 72}), std::nullopt);
QCOMPARE(resizeError(input, {.width = 20'000, .height = 10'001, .resolution = 72}), tooLarge);
QCOMPARE(resizeError(input, {.width = 30'000, .height = 1, .resolution = 72}), std::nullopt);
QCOMPARE(resizeError(input, {.width = 1, .height = 30'000, .resolution = 72}), std::nullopt);
// The same size skips every other rule: only resolution changes.
@@ -183,39 +184,56 @@ void ImageSizeTests::limitsAreJudgedAtTheirEdges()
void ImageSizeTests::budgetsCountEveryLayer()
{
// Scaled a hundredfold, the small layer takes a megapixel.
// Widened twice: a narrow layer, the remainder; wide, rows.
const qint64 budget = DocumentLimits::documentPixelBudget();
const qint64 rows = (budget - 1) / 30'000, rest = budget - rows * 30'000;
ProjectSnapshot input = imported();
input.manifest.width = 100;
input.manifest.height = 100;
ProjectLayerRecord small = input.manifest.layers[0];
small.transform = {.origin = {0, 0}, .size = {10, 10}};
ProjectLayerRecord whole = small;
whole.id = QUuid::createUuid();
whole.imageFile = uuidString(whole.id) + ".png";
whole.transform = {.origin = {0, 0}, .size = {100, 100}};
input.images.insert({whole.id, asset(halfRed(), "whole")});
input.manifest.layers = {small, whole};
ProjectLayerRecord narrow = input.manifest.layers[0];
narrow.transform = {.origin = {0, 0}, .size = {double(rest) / 2, 1}};
ProjectLayerRecord wide = narrow;
wide.id = QUuid::createUuid();
wide.imageFile = uuidString(wide.id) + ".png";
wide.transform = {.origin = {0, 0}, .size = {15'000, double(rows)}};
const ImageSizeOptions widened{.width = 200, .height = 100, .resolution = 72};
const auto tooLarge = std::optional(ProjectError::Kind::tooLarge);
QCOMPARE(resizeError(input, {.width = 10'000, .height = 10'000, .resolution = 72}), tooLarge);
// A megapixel and 99 more fill the budget exactly.
input.manifest.layers[1].transform.size = {99, 100};
const ProjectSnapshot full = ImageResizer::resize(input, {.width = 10'000, .height = 10'000, .resolution = 72, .sampling = LayerSampling::nearest});
QCOMPARE(full.images.at(whole.id).size(), QSize(9'900, 10'000));
input.manifest.layers[1].transform.size = {99.01, 100};
QCOMPARE(resizeError(input, {.width = 10'000, .height = 10'000, .resolution = 72}), tooLarge);
// Exactly the budget passes: the wide layer's missing image fails.
input.manifest.layers = {narrow, wide};
QCOMPARE(resizeError(input, widened), std::optional(ProjectError::Kind::missingImage));
// One pixel more, counted across both layers, does not.
input.manifest.layers[0].transform.size = {double(rest + 1) / 2, 1};
QCOMPARE(resizeError(input, widened), tooLarge);
input.manifest.layers = {wide};
QCOMPARE(resizeError(input, widened), std::optional(ProjectError::Kind::missingImage));
// Masks have their own budget, counted the same way.
input.manifest.layers = {small, whole};
input.manifest.layers = {narrow, wide};
input.manifest.layers[0].transform.size = {double(rest + 1) / 2, 1};
for (ProjectLayerRecord &layer : input.manifest.layers) {
layer.imageFile = std::nullopt;
layer.maskFile = uuidString(layer.id) + ".mask.png";
input.masks.insert({layer.id, LayerMask::assetFrom(gray(4, 4, 200))});
}
QCOMPARE(resizeError(input, {.width = 10'000, .height = 10'000, .resolution = 72}), tooLarge);
input.manifest.layers[1].transform.size = {99, 100};
QCOMPARE(ImageResizer::resize(input, {.width = 10'000, .height = 10'000, .resolution = 72, .sampling = LayerSampling::nearest})
.masks.at(whole.id).size(), QSize(9'900, 10'000));
input.manifest.layers[1].transform.size = {99.01, 100};
QCOMPARE(resizeError(input, {.width = 10'000, .height = 10'000, .resolution = 72}), tooLarge);
QCOMPARE(resizeError(input, widened), tooLarge);
// Exactly the budget passes: its surface then finds no memory.
input.manifest.layers[0].transform.size = {double(rest) / 2, 1};
std::optional<ExportError::Kind> kind;
{
const AddressSpaceLimit limit(16ll * 1024 * 1024);
try {
ImageResizer::resize(input, widened);
} catch (const ExportError &error) {
kind = error.kind;
}
}
QCOMPARE(kind, std::optional(ExportError::Kind::render));
// Past one surface, within the document's: a mask still fits.
if (budget > DocumentLimits::maxSurfacePixels + 30'000) {
const int past = int(DocumentLimits::maxSurfacePixels / 30'000) + 1;
input.manifest.layers = {input.manifest.layers[1]};
input.manifest.layers[0].transform.size = {15'000, double(past)};
QCOMPARE(ImageResizer::resize(input, widened).masks.at(wide.id).size(), QSize(30'000, past));
}
// A side past 30,000 is refused though the pixels fit.
ProjectSnapshot strip = imported();
strip.manifest.layers[0].transform = {.origin = {0, 0}, .size = {64, 1}};